var util = /^u/.test(typeof exports) ? util || {} : exports;
void function(exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.

	var formatRegExp = /%[sdj%]/g;
	exports.format = function(f) {
	  if (typeof f !== 'string') {
		var objects = [];
		for (var i = 0; i < arguments.length; i++) {
		  objects.push(inspect(arguments[i]));
		}
		return objects.join(' ');
	  }

	  var i = 1;
	  var args = arguments;
	  var len = args.length;
	  var str = String(f).replace(formatRegExp, function(x) {
		if (i >= len) return x;
		switch (x) {
		  case '%s': return String(args[i++]);
		  case '%d': return Number(args[i++]);
		  case '%j': return JSON.stringify(args[i++]);
		  case '%%': return '%';
		  default:
			return x;
		}
	  });
	  for (var x = args[i]; i < len; x = args[++i]) {
		if (x === null || typeof x !== 'object') {
		  str += ' ' + x;
		} else {
		  str += ' ' + inspect(x);
		}
	  }
	  return str;
	};


	exports.print = function() {
	  for (var i = 0, len = arguments.length; i < len; ++i) {
		process.stdout.write(String(arguments[i]));
	  }
	};


	exports.puts = function() {
	  for (var i = 0, len = arguments.length; i < len; ++i) {
		process.stdout.write(arguments[i] + '\n');
	  }
	};


	exports.debug = function(x) {
	  process.stderr.write('DEBUG: ' + x + '\n');
	};


	var error = exports.error = function(x) {
	  for (var i = 0, len = arguments.length; i < len; ++i) {
		process.stderr.write(arguments[i] + '\n');
	  }
	};


	/**
	 * Echos the value of a value. Trys to print the value out
	 * in the best way possible given the different types.
	 *
	 * @param {Object} obj The object to print out.
	 * @param {Boolean} showHidden Flag that shows hidden (not enumerable)
	 *    properties of objects.
	 * @param {Number} depth Depth in which to descend in object. Default is 2.
	 * @param {Boolean} colors Flag to turn on ANSI escape codes to color the
	 *    output. Default is false (no coloring).
	 */
	function inspect(obj, showHidden, depth, colors) {
	  var ctx = {
		showHidden: showHidden,
		seen: [],
		stylize: colors ? stylizeWithColor : stylizeNoColor
	  };
	  return formatValue(ctx, obj, (typeof depth === 'undefined' ? 2 : depth));
	}
	exports.inspect = inspect;


	// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
	var colors = {
	  'bold' : [1, 22],
	  'italic' : [3, 23],
	  'underline' : [4, 24],
	  'inverse' : [7, 27],
	  'white' : [37, 39],
	  'grey' : [90, 39],
	  'black' : [30, 39],
	  'blue' : [34, 39],
	  'cyan' : [36, 39],
	  'green' : [32, 39],
	  'magenta' : [35, 39],
	  'red' : [31, 39],
	  'yellow' : [33, 39]
	};

	// Don't use 'blue' not visible on cmd.exe
	var styles = {
	  'special': 'cyan',
	  'number': 'yellow',
	  'boolean': 'yellow',
	  'undefined': 'grey',
	  'null': 'bold',
	  'string': 'green',
	  'date': 'magenta',
	  // "name": intentionally not styling
	  'regexp': 'red'
	};


	function stylizeWithColor(str, styleType) {
	  var style = styles[styleType];

	  if (style) {
		return '\033[' + colors[style][0] + 'm' + str +
			   '\033[' + colors[style][1] + 'm';
	  } else {
		return str;
	  }
	}


	function stylizeNoColor(str, styleType) {
	  return str;
	}


	function formatValue(ctx, value, recurseTimes) {
	  // Provide a hook for user-specified inspect functions.
	  // Check that value is an object with an inspect function on it
	  if (value && typeof value.inspect === 'function' &&
		  // Filter out the util module, it's inspect function is special
		  value.inspect !== exports.inspect &&
		  // Also filter out any prototype objects using the circular check.
		  !(value.constructor && value.constructor.prototype === value)) {
		return value.inspect(recurseTimes);
	  }

	  // Primitive types cannot have properties
	  var primitive = formatPrimitive(ctx, value);
	  if (primitive) {
		return primitive;
	  }

	  // Look up the keys of the object.
	  var visibleKeys = Object.keys(value);
	  var keys = ctx.showHidden ? Object.getOwnPropertyNames(value) : visibleKeys;

	  // Some type of object without properties can be shortcutted.
	  if (keys.length === 0) {
		if (typeof value === 'function') {
		  var name = value.name ? ': ' + value.name : '';
		  return ctx.stylize('[Function' + name + ']', 'special');
		}
		if (isRegExp(value)) {
		  return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
		}
		if (isDate(value)) {
		  return ctx.stylize(Date.prototype.toString.call(value), 'date');
		}
		if (isError(value)) {
		  return formatError(value);
		}
	  }

	  var base = '', array = false, braces = ['{', '}'];

	  // Make Array say that they are Array
	  if (isArray(value)) {
		array = true;
		braces = ['[', ']'];
	  }

	  // Make functions say that they are functions
	  if (typeof value === 'function') {
		var n = value.name ? ': ' + value.name : '';
		base = ' [Function' + n + ']';
	  }

	  // Make RegExps say that they are RegExps
	  if (isRegExp(value)) {
		base = ' ' + RegExp.prototype.toString.call(value);
	  }

	  // Make dates with properties first say the date
	  if (isDate(value)) {
		base = ' ' + Date.prototype.toUTCString.call(value);
	  }

	  // Make error with message first say the error
	  if (isError(value)) {
		base = ' ' + formatError(value);
	  }

	  if (keys.length === 0 && (!array || value.length == 0)) {
		return braces[0] + base + braces[1];
	  }

	  if (recurseTimes < 0) {
		if (isRegExp(value)) {
		  return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
		} else {
		  return ctx.stylize('[Object]', 'special');
		}
	  }

	  ctx.seen.push(value);

	  var output;
	  if (array) {
		output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
	  } else {
		output = keys.map(function(key) {
		  return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
		});
	  }

	  ctx.seen.pop();

	  return reduceToSingleString(output, base, braces);
	}


	function formatPrimitive(ctx, value) {
	  switch (typeof value) {
		case 'undefined':
		  return ctx.stylize('undefined', 'undefined');

		case 'string':
		  var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
												   .replace(/'/g, "\\'")
												   .replace(/\\"/g, '"') + '\'';
		  return ctx.stylize(simple, 'string');

		case 'number':
		  return ctx.stylize('' + value, 'number');

		case 'boolean':
		  return ctx.stylize('' + value, 'boolean');
	  }
	  // For some reason typeof null is "object", so special case here.
	  if (value === null) {
		return ctx.stylize('null', 'null');
	  }
	}


	function formatError(value) {
	  return '[' + Error.prototype.toString.call(value) + ']';
	}


	function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
	  var output = [];
	  for (var i = 0, l = value.length; i < l; ++i) {
		if (Object.prototype.hasOwnProperty.call(value, String(i))) {
		  output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
			  String(i), true));
		} else {
		  output.push('');
		}
	  }
	  keys.forEach(function(key) {
		if (!key.match(/^\d+$/)) {
		  output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
			  key, true));
		}
	  });
	  return output;
	}


	function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
	  var name, str, desc;
	  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
	  if (desc.get) {
		if (desc.set) {
		  str = ctx.stylize('[Getter/Setter]', 'special');
		} else {
		  str = ctx.stylize('[Getter]', 'special');
		}
	  } else {
		if (desc.set) {
		  str = ctx.stylize('[Setter]', 'special');
		}
	  }
	  if (visibleKeys.indexOf(key) < 0) {
		name = '[' + key + ']';
	  }
	  if (!str) {
		if (ctx.seen.indexOf(desc.value) < 0) {
		  if (recurseTimes === null) {
			str = formatValue(ctx, desc.value, null);
		  } else {
			str = formatValue(ctx, desc.value, recurseTimes - 1);
		  }
		  if (str.indexOf('\n') > -1) {
			if (array) {
			  str = str.split('\n').map(function(line) {
				return '  ' + line;
			  }).join('\n').substr(2);
			} else {
			  str = '\n' + str.split('\n').map(function(line) {
				return '   ' + line;
			  }).join('\n');
			}
		  }
		} else {
		  str = ctx.stylize('[Circular]', 'special');
		}
	  }
	  if (typeof name === 'undefined') {
		if (array && key.match(/^\d+$/)) {
		  return str;
		}
		name = JSON.stringify('' + key);
		if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
		  name = name.substr(1, name.length - 2);
		  name = ctx.stylize(name, 'name');
		} else {
		  name = name.replace(/'/g, "\\'")
					 .replace(/\\"/g, '"')
					 .replace(/(^"|"$)/g, "'");
		  name = ctx.stylize(name, 'string');
		}
	  }

	  return name + ': ' + str;
	}


	function reduceToSingleString(output, base, braces) {
	  var numLinesEst = 0;
	  var length = output.reduce(function(prev, cur) {
		numLinesEst++;
		if (cur.indexOf('\n') >= 0) numLinesEst++;
		return prev + cur.length + 1;
	  }, 0);

	  if (length > 60) {
		return braces[0] +
			   (base === '' ? '' : base + '\n ') +
			   ' ' +
			   output.join(',\n  ') +
			   ' ' +
			   braces[1];
	  }

	  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
	}


	// NOTE: These type checking functions intentionally don't use `instanceof`
	// because it is fragile and can be easily faked with `Object.create()`.
	function isArray(ar) {
	  return Array.isArray(ar) ||
			 (typeof ar === 'object' && objectToString(ar) === '[object Array]');
	}
	exports.isArray = isArray;


	function isRegExp(re) {
	  return typeof re === 'object' && objectToString(re) === '[object RegExp]';
	}
	exports.isRegExp = isRegExp;


	function isDate(d) {
	  return typeof d === 'object' && objectToString(d) === '[object Date]';
	}
	exports.isDate = isDate;


	function isError(e) {
	  return typeof e === 'object' && objectToString(e) === '[object Error]';
	}
	exports.isError = isError;


	function objectToString(o) {
	  return Object.prototype.toString.call(o);
	}


	exports.p = function() {
	  for (var i = 0, len = arguments.length; i < len; ++i) {
		error(exports.inspect(arguments[i]));
	  }
	};
	/* zswang
	module.deprecate('p', 'Use `util.puts(util.inspect())` instead.');
	 */

	function pad(n) {
	  return n < 10 ? '0' + n.toString(10) : n.toString(10);
	}


	var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
				  'Oct', 'Nov', 'Dec'];

	// 26 Feb 16:19:34
	function timestamp() {
	  var d = new Date();
	  var time = [pad(d.getHours()),
				  pad(d.getMinutes()),
				  pad(d.getSeconds())].join(':');
	  return [d.getDate(), months[d.getMonth()], time].join(' ');
	}


	exports.log = function(msg) {
	  exports.puts(timestamp() + ' - ' + msg.toString());
	};


	exports.exec = function() {
	  return require('child_process').exec.apply(this, arguments);
	};
	/* zswang
	module.deprecate('exec', 'It is now called `child_process.exec`.');
	*/

	exports.pump = function(readStream, writeStream, callback) {
	  var callbackCalled = false;

	  function call(a, b, c) {
		if (callback && !callbackCalled) {
		  callback(a, b, c);
		  callbackCalled = true;
		}
	  }

	  readStream.addListener('data', function(chunk) {
		if (writeStream.write(chunk) === false) readStream.pause();
	  });

	  writeStream.addListener('drain', function() {
		readStream.resume();
	  });

	  readStream.addListener('end', function() {
		writeStream.end();
	  });

	  readStream.addListener('close', function() {
		call();
	  });

	  readStream.addListener('error', function(err) {
		writeStream.end();
		call(err);
	  });

	  writeStream.addListener('error', function(err) {
		readStream.destroy();
		call(err);
	  });
	};


	/**
	 * Inherit the prototype methods from one constructor into another.
	 *
	 * The Function.prototype.inherits from lang.js rewritten as a standalone
	 * function (not on Function.prototype). NOTE: If this file is to be loaded
	 * during bootstrapping this function needs to be revritten using some native
	 * functions as prototype setup using normal JavaScript does not work as
	 * expected during bootstrapping (see mirror.js in r114903).
	 *
	 * @param {function} ctor Constructor function which needs to inherit the
	 *     prototype.
	 * @param {function} superCtor Constructor function to inherit prototype from.
	 */
	exports.inherits = function(ctor, superCtor) {
	  ctor.super_ = superCtor;
	  ctor.prototype = Object.create(superCtor.prototype, {
		constructor: {
		  value: ctor,
		  enumerable: false,
		  writable: true,
		  configurable: true
		}
	  });
	};
}(util);